Convert AAC to AIFF Online Free
Convert AAC audio to uncompressed AIFF format for use in Logic Pro, GarageBand, and macOS professional audio workflows. FFmpeg decodes the AAC and outputs high-fidelity uncompressed AIFF.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts your AAC to AIFF using FFmpeg on secure servers. AIFF is Apple's uncompressed audio format, native to Logic Pro and macOS DAW workflows. Converting AAC to AIFF enables uncompressed editing and mixing without the re-encoding artifacts of working with lossy sources. Files are auto-deleted after conversion, free with no signup.
Convert AAC to AIFF
Drop your AAC file here to convert it instantly
Drag & drop your .aac file here, or click to browse
Convert to AIFF instantly
AAC vs AIFF: Format Comparison
Key differences between the two formats
| Feature | AAC | AIFF |
|---|---|---|
| Compression | Lossy | Uncompressed PCM |
| File Size (3 min) | ~3–6 MB | ~30–60 MB |
| Logic Pro Native | Good support | Preferred native format |
| CD Burning on macOS | Requires conversion | Direct support |
| Audio Editing | Not recommended (lossy) | Preferred (uncompressed) |
| Loop Point Metadata | No | Yes (MARK/INST) |
| macOS Compatibility | Excellent | Excellent (native) |
| Windows Compatibility | Good | Requires iTunes or VLC |
When to Convert
Common scenarios where this conversion is useful
Logic Pro mixing with uncompressed source material
Professional mixing engineers prefer uncompressed source audio. Convert AAC tracks to AIFF to work with uncompressed audio in Logic Pro, avoiding additional compression artifacts during mixing.
GarageBand project audio import
GarageBand works natively with AIFF files. Convert AAC recordings or purchased music to AIFF for direct import into GarageBand projects without conversion warnings.
CD track creation from AAC library
Burn CDs from your AAC music library by converting tracks to AIFF first. macOS Disc Utility and Toast Titanium accept AIFF directly as CD audio source files.
Sample preparation for Apple audio tools
Convert AAC samples to AIFF for use in Apple's EXS24 sampler in Logic Pro. Samplers benefit from uncompressed audio to avoid decoding overhead during real-time playback.
Who Uses This Conversion
Tailored guidance for different workflows
Musicians & Producers
- Convert AAC recordings to AIFF for distributing tracks to streaming platforms or collaborators
- Transform AAC stems to AIFF for sharing with other producers or mixing engineers
Podcasters
- Convert AAC episode recordings to AIFF for publishing on Apple Podcasts, Spotify, or RSS feeds
- Transform AAC interview recordings to AIFF for editing in Audacity or Adobe Audition
Content Creators
- Convert AAC audio from video shoots to AIFF for use as background music or voiceovers
- Extract and convert AAC audio to AIFF for repurposing content across multiple platforms
How to Convert AAC to AIFF
-
1
Upload your AAC file
Click the upload area or drag and drop your AAC or M4A file. Files up to 25MB (free tier; 500MB on Pro) are accepted. The upload uses HTTPS for security.
-
2
Convert to AIFF
Click Convert. FFmpeg decodes the AAC audio to raw PCM and encodes it into an AIFF container. The output is uncompressed 16-bit PCM at the source sample rate.
-
3
Download your AIFF file
Download the resulting AIFF file. Note that it will be significantly larger than the source AAC. The file is auto-deleted from our servers after download.
Frequently Asked Questions
No. The source AAC is already lossy, so any artifacts present in the AAC will remain in the AIFF output. The AIFF is uncompressed, but quality is bounded by the original AAC encoding. No lost audio data is recovered.
AAC uses lossy compression to achieve small file sizes. AIFF stores raw uncompressed PCM audio data. The same 3-minute song at 256 kbps AAC (~6 MB) becomes approximately 30-50 MB as AIFF.
Yes. Logic Pro has native AIFF support. You can drag the AIFF file directly into your project's Tracks area or import it via File > Import Audio File. No plugins or conversion steps are needed.
Yes. Pro Tools supports AIFF files and treats them similarly to its native BWF/WAV format. You can import AIFF files directly into Pro Tools sessions without conversion.
FFmpeg outputs AIFF at 16-bit PCM, which is the standard for CD-quality audio and compatible with all major DAWs and macOS audio applications.
Windows does not natively support AIFF. You need iTunes, VLC, or a DAW with AIFF support to play AIFF files on Windows. For cross-platform uncompressed audio, WAV is a better choice.
Yes, with caveats. Working from AIFF avoids re-encoding artifacts during editing and export. However, since the source is lossy AAC, you still start with AAC-quality audio. Always use lossless sources when possible.
Yes. Files are uploaded over HTTPS, processed by FFmpeg on secure servers, and automatically deleted after download. We do not store or share your audio content.
Related Conversions
Related Tools
Free tools to edit, optimize, and manage your files.
Need to convert programmatically?
Use the ChangeThisFile API to convert AAC to AIFF in your app. No rate limits, up to 500MB files, simple REST endpoint.
Ready to convert your file?
Convert AAC to AIFF instantly — free, no signup required.
Start Converting